St John's

St John's Laboratory is a private UK life science tools company that supplies research antibodies, ELISA and CLIA kits, proteins, peptides, and related reagents to academic, biotech, and pharmaceutical customers. The business is focused on enabling in vitro protein and metabolite detection, quantification, and validation rather than developing therapeutic drug candidates. It emphasizes antibody validation, trial-size sampling, and digital access to validation data and scientific resources. The company markets a large catalog of research-use products and positions sustainability and supply-chain transparency as part of its value proposition. It appears to be an operating commercial supplier rather than a therapeutics developer.